Obstruction lighting structure



Feb. 21, 1950 c. K. LAMB oBsTRucTIoN LIGHTING STRUCTURE Filed Feb. 22, 1945 IN VEN TOR. CL V05 Ams Patented Feb. 21,l 1950 UNITED STATES.

oFF-ics OBSTRUGTIONLIGHTING STRUCTURE Clyde K.. Lamb, Cleveland-,t ohio, assignorg-'by' direct" and! mesne y assignments; to Lamb` 85* Chapin; Incorporated, Cleveland; h'io,1a11corporation ofi-Ohio Application February- 22, 1945;,S'erialiNo. y579,292

(Cl. 24U-2) 2"- Claims. 1.

invention'k relates to obstruction. lighting' structuresandrel'ates morefparticularly to the provision of a` permanentv lighting structure adaptedto circumscribe. a. chimney. or stack and carrying, lights which are visible both from the ground. and. from the air and which are particularly useful in. warning approaching aircraft to incorporating. therein means whereby said. lightsmay be easily cleaned by remote. controL,

preferably locatedatgroundlevel.

Other objects of` my invention-and the invention itself. will become. increasingly. apparentv reierencel'to the followingdescriptionof embodiments of my` invention andtothedrawingsthereg of, in whichdrawings:

Fig.. 1 is atop planview, partially inv section, certain.. portions being broken away so that other parts may4 be..more fully illustrated, ofthe lightingstructure of'y my.V invention as applied to. a.

circularst'ack;

Fig.. 2 .is .a side..elevationalview of. thelighting.

structure of Eig.' l, said view having certainportions broken away;

Eig. 3 is. a. front planview ofthe. embodimenty of Eigs. 1 andv 2 but showinganother. modification of .such design.

Referringnow tothe drawings, in all of which like parts are designated. b'y. like. reference char.- acters, at i' Ihaveindicated" generally. the obstruction lighting; structure4 of. my. invention, this.

lighting. structure consisting of.- three light-car.- rying mountings, A, B' and'LC,`A anda., pair of reinforcing members, DT and.E.. It, willbeobvious that, accordingto the. size ofthe stack or. chimney upon.. which4v such. lighting. structure is,` carried,

thev number. of. lighting structures warningof the presenceofsuch air obstruction to aircraft. and,`

the like, may be varied and hence` the number of' reinforcing members may be increased; Such reinforcing members mayfurtl'er be. eliminated; if desired.

' Eaclrofthe metallicbands 'andliare preferably further; asbestsh'ownin Fig; l; composedof a In normal" scaffold" construction employed'` in creating' a stagingfor workA on chimneys,` etes, a" pairbf-"metallic bands'ilv and' li are adaptedv to be` telescoped about` the entire circumference oi" the) stack-or chimney 5, said bands being spaced` a'l substantial distance apart and beingv disposedA about the entire circumference of thestack orV chimney 5 at the height at which the structure is'- to be positioned:4 A preferred spacing betweenA the'bandsin' my invention is about 4U".

plura'lityof similar metal bandssecured together b'y couplings'wliicli` are bolted together wherefore thebands" are tightly securedtothe chimney vor" stack structure andtheV light-carrying de'- vices,.A`, Bz and'C, and the reinforcing membersV D' 'andEare rigidly secured thereto.

ltwill be notedt'liat4 apluralityof U-shaped' stepl members' 30 are disposed overthe band, said" steps being; provided with downwardlyex tending portions 3l disposed between the bands 4l and the chimney structure, a hooked end portion 3-2" of*r each locking'the step tothe band and preventingthe disengagement' of the' step' there-V A plurality of hand grip members. 30', aligned with s'aid step and* having downwardly extend.-

ingportions- 3l endingin upwardly disposedtend hook` portions 32 and similarly formed to the step members' 30, are disposed' between' the upper band'dandthe chimney or stack. These hand grip' andstep membersare similar to those described a'nd claimed in Patent No. 2,358,014 of 'this' 4 applicant.

The improve'diobstruction'lighting structure of.

my. present.' invention is' preferably embodied in acombin'edback" rail and loop structurel which is 'formed' in'thefollowing manner A plurality Ofloops` lil; preferably tubular and cylindrical in form and comprising a relatively long stem` portion Z'-an'd ar curved head l portion 4i ande tof. Vcarry a@ guar-d" rail l. structure at. a' point spaced-fromr the. chimney, the curved head1-portion.V extending outwardly from` andl aboveV the.-

heig-htof the upperr band 3.A

TheV stem portion is. disposed betweenthe bands Sand@ andthe chimney, lying. substantially flush.

therewith and saidstemyportion. 20 terminates in a hooked end portion. 2| curved about. the

lower band portion 4 wherebyit isrigidly secured thereto.

The outwardlyextending head vportion 22 terminates. in .an outwardly 'disposed upwardlyhooked end portion 23 upon which a rectangular cross member 24 is carried, said member 24 supporting the light fixtures, generally indicated at 25.

A conduit 26 outwardly spaced from the cylindrical stack a suitable distance and forming an outer cylindrical band and guard rail structure encompassing such stack is adapted, in the form of my invention shown in Figs. 1 and 2, to be disposed beneath the cross members 24 passing through the hooked end portion 23' of the light carrying loop structure.

It is to be noted that in the form of Figs. 1 and 2 and according to the size of the stack there employed, three of such light carrying structures are provided and that the conduit is continuous beginning at the structure B, passing through the structure A, and terminating in the structure C.

The reinforcing members D and E are formed similarly to the loop structures carrying the light fixtures with the exception that the stem portion thereof is not of such length as to extend through the band l but terminates in a turned in hooked end portion 2B disposed over the outer face of the cylindrical band 3 and an opposite hooked end portion '29, secured to the conduit 26, as by welding or the like.

The lighting support structure A consists in a step 4B adapted to be pivotally secured, as at 4l, to a ladder secured to the stack and projecting through the structure A, as shown in Figs. 1 and 2. The rearward portion of the step di? when down is adapted to rest upon a pair of diagonally disposed members d2 carried by opposite sides of the ladder structure, and to be secured to the ladder by a hook 43 when in its inoperative up position whereby it is locked against the ladder structure in such position.

The looped overhead portion 22 of the light carrying structure shown as A is adapted to be projected between a pair of adjacent -rungs of the ladder and centrally of said ladder at a point midway between the sides thereof whereby the ladder may be utilized by workmen desiring to use the same to ascend to the top of the stack structure.

Also, it is to be noted that, as best shown in Fig. 1, the lighting xtures carried by the cross member of the said structures A, B and C, preferably comprise apair of G-watt lamps, or lamps of whatever power be desired, said lamps being mounted in the form shown upon a conduit box 50, receiving current through a cable carried by the conduit 5l, said cable 'being brought uplthe chimney adjacent the ladder and passing through the portion 22 to the lights at stations A, B and C.

An air conduit 6!) further disposed adjacent the ladder is brought up the chimney and disposed within the portion 2'2 of the structure at A, traveling across the cross member 2li from whence the conduit branches off to a pair of narrow tubes, preferably of copper, 'l0- 10, a pair of each of these being placed about each of the lamps and spaced therefrom, said tubes being bowed at their upper ends in the manner shown in my aforesaid patent and having each an open jet 'H through which the air is blown from remote control means mounted at ground level with sufficient force directed at the convex head of the lamp to thoroughly clean the same.

'A ring member 72 is secured about the lower ends of the bowed tubes 'l0-'l0 to retain the same in place as by a clamp member.

The air conduit proceeds to structure B and C through the conduit 2B to clean the lamps thereat disposed through jets 1I thereof.

Since the air pressure is operated from remote control means mounted upon the ground or at a lower position on the stack, the lights may be cleaned therefrom, eliminating the necessity of a workman climbing the stack and cleaning the same, but in the event that a lamp structure needs replacement or repair, it will be necessary for a workman to ascend the ladder 9 and to travel about the chimney at the stage of mounting.

To secure this desired movement, the workman walks about the outer periphery of the chimney f and at all times in his travels from the light carrying structure A to B, or from B to A or A to C or C to A etc., is protected by the conduit 26 acting as a back guard rail member.

The steps 40 which are disposed in connection with the light carrying structures A, B and C, and positioned as abovedescribed with respect to the y structure A, are hinged at stations B and C to a ture and adapted to be securely locked to `said step Sii similar to the other steps 3U disposed about the chimney, which acts as a continuance of the staging provided by the step 40 and other step members 3B. Work platforms 4D are provided at stations B and C in connection therewith, said platforms being secured to the steps 3D" or, as are the steps 30, telescoped over the band 3.

Fig. 3 is similar to the described form of my invention with the exception that a pair of overhead bridge members or like carrying structures are provided in lieu of the single structure shown in Figs. 1 and 2.

While I am aware that numerous and extensive departures can be made from the scope of my invention herein described and claimed without departing however from the spirit of my invention and the scope of the appended claims, I claim:

1. An obstruction lighting structure comprising a lamp supporting member, said member having a substantially long leg and a relatively shorter leg, said legs being connected by a concave loop portion, said relatively longer leg being disposed vertically of an upright cylindrical'work structure and adapted to be securely locked to said work structure byy means of a pair of bands telescoped over said work structure and securely locked therewith, said longer leg portion having a locked end portion adapted to be bent into locking engagement with the lowermost of said cylindrical bands and the relatively shorter leg having an upwardly bent portion, a lamp base being securely alixed thereto, said' lamp base adapted to support a pair of electrical lamps whereby said lamps are secured to said work structure at a point lspaced outwardly therefrom, a circular guard rail adapted to be secured to said hooked end portion of said relatively shorter leg, said guard rail being secured to said work structure by means of said lamp supporting member and by means of concave loop reinforcement members further secured to said work structure, a platform secured to the cylindrical work structure and disposed adjacent the lowermost end portion of said relatively longer leg.

2. An obstruction lighting structure comprising a lamp supporting member, said member having a substantially long leg and a relatively shorter leg, said legs being connected by a concave loop portion, said relatively longer leg being disposed verticallyv of anupright cylindrical work strucwork structure by means of a pair of bands telescoped over said work structure and securely locked therewith, said longer leg portion having a locked end portion adapted to be bent into locking engagement with the lowermost of said cylindrical bands and the relatively shorter leg having an upwardly bent portion, a lamp base being securely aiixed thereto, said lamp base adapted to support lighting xtures whereby said lighting xtures are secured to said work structure at a point spaced outwardly therefrom, a clrcular guard rail adapted to be secured to said hooked end portion of said relatively shorter leg, said guard rail being secured to said work structure by means of said lamp supporting member and by means of concave loop reinforcement members further secured to said work structure.

CLYDE K. LAMB.

REFERENCE S CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date D. 133,912 Lamb bept. 29, 1942 335,164 Vitalis Feb. 2, 1886 1,140,192 Shaw May 18, 1915 1,547,915 Hirn July 28, 1925 2,070,334 Garber Feb. 9, 1937 2,358,914 Lamb Sept. 12, 1944 

